Bogie with one or several axles.



C. DE BANGE.

BOGIE WITH ONE OF. SEVERAL AXLBS.

APPLICATION FILED 00w. 22,1907.

Patented Mar. 2, 1909.

3 SHEETS-SHEET 1.

@wn \i nw -D L T I LU L C. DE BANGE.

BOGIE WITH ONE OR SEVERAL AXLES. APPLICATION FILED 00'1.22,1907.

913,872. Patent d Mar. 2, 1909.

3 SHEETS-SHEET Z.

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CHARLES DE BANGE, OF VERSAILLES, FRANCE.

BOGIE WITH ONE OR SEVERAL AXLES.

. have invented certain new and useful 1mprovements in Bogies with one or Several Axles, of Which the following is a full, clear,

and exact description, such as will enable others skilled in the art to which it appertains to carry out the same.

This invention has for its object improvements relating to the mounting on Wheels of the rolling stock of railways and tramways.

In the U. S. patent of De Bange No. 758,233 the arrangements described Were combined in such a way that the Wheels of the same pair should be always loaded ap proximately equally, and that in no case could one Wheel be without load, or even lifted from the track as is possible with rolling stock now in use. This result is obtained by suspending the carriage body or load at its two extremities upon two points situated on an axis passing above the center of gravity of the load, and in the vertical lane through the middle of the axles. The oad may freely oscillate around its axis of suspension and it is hung in a stable manner since in the oscillations around the axis of suspension the center of gravity is raised and always tends to descend again.

The invention supplies a new solution of the problem intended specially for application in the mounting of carriage bodies or loads on bogies or pivoting axles and it has for its advantages to simplify the construction and to offer a great stability to the load.

It is possible by this invention to pass over curves of very small radius, the Wheels always remaining approximately equally loaded.

In the arrangement of the present invention, the load rests on supporting parts having convex surfaces to which it is rigidly fixed; these in turn resting on other parts having concave surfaces supported on the axles. The concave pieces have a radius of curvature greater than that of the convex pieces, and the centers of curvature of both the concave and convex pieces are higher, The

than the center of gravity of the load. convex and concave surfaces are connected together by one or several engaging teeth Which only permit them to have a rolling movement one upon the other.

In the accompanying diagrammatic draw- Specification of Letters Patent.

Application filed October 22, 1907.

Patented March 2, 1909.

Serial No. 398,633.

ings: Figure 1 is a plan of the chassis of a vehicle mounted on two single-axle bogies; Figs. 2 and 3 are elevations of the left and right hand bogies; Fig. 4 is a longitudinal section through the middle of the bogies; Fig. 5 is a transverse section of one of the bogies Fig. 6 is a longitudinal section showing the mounting of the chassis of a carriage on two pair of axle-bogies; Fig. 7 is a plan view of the bogies of Fig. 6; Fig. 8 is a detail view of one of the suspension cross pieces of the carriage body Fig. 9 is a longitudinal section showing a four axle bogie; Fig. 10 is a plan view of this bogie; Figs. 11, 12, 13 and 14 are transverse sections respectively on the lines AA, BB, C-C, DD, of Fig. 10.

The principle of this invention Will be described with reference to Figs. 1, 2 and 3. To facilitate the explanation the elevation of the outer rail under the right hand axle has been considerably exaggerated but in practice this elevation will always be small. The concave piece a (Fig. 2) resting on the axle of the Wheels is shaped to the arc of a circle, and the carriage body or load rests at the point I) on the piece a by means of a convex piece 0 also shaped to the arc of a circle. The center of curvature h of the piece a is above the center of curvature 'L of the piece 0 and these two centers are above the center of gravity (1 of the load. The teeth d out like those on gearing, and projecting downward from the convex piece 0, engage in cavities formed in the concave piece a. The object of these teeth is to prevent the sliding of the pieces a and 0 one on the other, and to permit a rolling motion only. If new it is supposed that the right hand axle takes the inclined position of Fig. 3 in consequence of the elevation of a point in the rail, the left hand axle remaining in the horizontal position, it is seen that the point of contact between the concave and convex pieces a and c at the right hand end (Fig. 3) comes to be at the point m While at the left hand end the point of contact remains at b. The load then rests on two points situated on the straight line b m. (Fig. l) and the center of gravity lies upon a vertical passing outside this line. The load is therefore in an unstable position which causes the displacement of the points of contact I) m in such a Way that the straight lines passing through the new points of contact cuts the vertical passing through the center of gravity g; a

rolling motion is produced of the pieces 0 and c in such a way that the point 5 comes to b (Fig. 2) and the point on to m (Fig. 3), a position in which the line b m (Fig. 1) cuts the vertical passing through the center of gravity g. The surfaces of contact of the concave and convex pieces may be conical or cylindrical but with diflerent radii oi curvature, and the results will be the same provided that in all cases the center of grayity of the load is belo" the center of curva ture of the rolling surfaces.

In a very light carriage having a variable load which is unequally divided it would desirable to check the oscillations produced by the mounting and dismountin oi the travelers and this could be effected by inserting a moderating spring having an initial tension such that the rolling would not be produced except when the raising of one wheel has attained a desired height. This spring is not illustrated in the drawings because its place of insertion depends upon the type of carriage and because its application comes within the scope of known things.

With reference to Figs. 4 and 5 it will now be shown how the invention may be carried out in practice. A support 3 provided with a pivot pin 4 rests on an axle 1 b means of horizontal arms transmitting the load with or without interposition of springs, to the axle boxes 2 which are supposed to be placed on the inner side of the externally hanged 'wheels. A piece 5 having a convex surface is engaged by the pivot pin 4 in such a way that the axle may turn relatively to the piece 5 and may adjust itself into the direction of the radius of the track. The piece terminates at the top in a cylindrical surface, the center of curvature of which is projected at h. The piece 6 having a convex surface is in connection with the car-body 7 and rests on the concave piece 5 by a cylindrical surface, the center of curvature of which is seen projected at i below h, but above the center of gravity 9 of the carriage body or load. The piece 6 is provided with two gearing teeth 8 which engage in the piece 5 in such a way that these two pieces can only move with a rolling motion. An archedpiece 9 rests on the convex piece 6 to which it is fixed at the top and it is attached at the bottom to cross-pieces 10 connected to the side girders 11 of the chassis of the vehicle body. A slotted piece 12 attached to these same cross pieces guides the lower pivot pin 13 of the piece 3. This slotted piece may be replaced by a link attachment on the one hand to the pivot pin 13 and on the other hand to a point on the chassis of the vehicle body. The object of this slotted piece is to guide the piece 3 at the bottom while permitting the angular movement of the axle in following the curvature of the rails in a vertical direction. The arrangement indicated for the single axle bogie is applicable for the pair of axle bogie. It is surlicient to consider the bogie as a wagon having two axles.

Referring to Figs. 6, 7 and 8, it is seen that 15 represents the vertical support of a small chassis, the top pieces 16 of which form the convex surfaces, while the lower parts 17 form guides for the lower pivot pins 18. T he chassis 15 is traversed by a strong vertical bolt 19 forming part of the cross piece 20 which rests on the vertical chassis 15. The cross piece 20 (Fig. 8) terminates in forks 21 traversed by pins 22 on which rest shackles 23 which are the .iselves traversed by pins engaging in the longitudinal girders 25 of the chassis of the vehicle body. The axes of the bolts 22 are in the plane passing through the centers of the wheels axles, but the large chassis 25 of the vehicle body may be indiiierently either above or below this plane.

Figs. 9, 10, 11, 13,and 14,1epresentabogie having four axles 'ith the arrangement of the invention applied thereto. The load rests on the bogie by a cross piece 30 having a lower convex surface (Fig. 11), the longitudinal girders 31 of the chassis of the carriage being suspended by means of pivot pins at the extremities of the cross piece 30; this latter rests on a concave piece" 32 and is uided by two teeth 33 in such a way that he cross piece can only roll and not slide on t is piece 32. The piece 32 rests on a strong cross piece 34 to which it is fixed by means of a pivot 35 which allows the piece 32 to pivot upon the cross piece 34. The cross piece 34 is fixed to the longitudinal side pieces 36 or' a small chassis. The ends .36 of the small chassis are hung upon a cross piece 37 by means of shackles 38 (Fig. 12). The cross piece 37 rests on the vertical supports 39 of a frame and it is held by means oi a long bolt 40 which allows it to pivot on this frame. One of the bars or" the support 39 carries a convex piece 41 (Figs. 9 and 14) which rolls on a concave piece 42 resting on the axle 43 in the manner already explained; the other arm of the support 39 rests on its end 45, fixed by means of a bolt 47 around which it may pivot, upon the cross piece 46 (Fig. 13)

resting upon the axle 48. It will be noted that in this last arrangement the parts rolling upon one another are provided above one only of the axles, while above the other axle there is only a vertical pivot. This is done with the object of simplifying the construction, but it will be understood that the four w'ieels will be loaded approximately equally since the load rests on two points, and on account of the pieces rolling one upon the other, one of the axles may be inclined relatively to the other without displacing the latter. Following out the same principle it would be possible to provide the bogie with i the car body and adapted to rock freely three axles, treating the problem as if two axles Were brought together. l

What I claim is- 1. A car having a truck near each end, comprising in combination a concave support carried by each truck and convex supporting parts fixed near the two ends of the I car body and adapted to rock freely upon said concave supports; the centers of curva- I ture of all the rocking surfaces being higher I than the center of gravity of the car and load and the convex surfaces having a shorter' radius of curvature than the concave surfaces, substantially as described.

2. A car having a truck near each end, comprising in combination a concave supportpivoted over each truck and convex supporting parts fixed near the two ends of upon said concave supports; the centers of curva- I ture of all the rocking surfaces being higher I than the center of gravity of the car and load and the convex surfaces having a shorter radius of curvature than the concave surfaces, substantially as described.

3. A car having a truck near each end, comprising in combination fixed parts (as 3) supported upon the axles at opposite ends of the car, upper and lower pivots thereon, concave supporting parts pivotally supported by said fixed parts 3, stringers on the car body, cross pieces joining said stringers v means attached to said stringers for engaging said lower pivots on the parts 3, and convex supporting parts rigidly attached to said stringers and adapted to rock freely upon said concave supporting parts, substantially as described.

4. A car having a truck near each end, comprising in combination a concave support carried by each truck and having recesses in its concave surface, and convex supporting parts fixed near the two ends. of the car bod and provided with teeth adapted to enter said recesses; said convex parts having a shorter radius of curvature than said concave parts and being adapted to rock freely thereon so that the centers of curvature of both the convex and the concave parts are constantly higher than the center of gravity of the car and load, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of the two subscribing witnesses.

C. DE BANGE. W'itnesscs:

FR. DU BOISROUVRAY, DEAN B. MAsoN. 

